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HaiI think Document Rules will be same here also .Document Rules1)You can upload documents that have file names of up to 255 characters including the extension. 2)The size limit for any document you upload is 5 MB. The maximum size for a custom-app logo is 20 KB.<apex:inputFile value="{!contract.body}" fileName="{!contractName}"/>public String contractName {get;set;} public Attachment get { if (contract == null) { contract = new Attachment(); } return contract; } set;}You neeed more information go to this url its useful http://bobbuzzard.blogspot.in/2011/01/uploading-multiple-attachments-via.htmlPlease select this answer is useful you